Fix issue 14 NEC transmit error on RP2.

[micorpython_ir.git] / RECEIVER.md

diff --git a/RECEIVER.md b/RECEIVER.md
index d6998f1cb25c1acd077f369576148ef12d2237d3..fe1493efbcd4d02e3418e0aa1a21a8c9dd498440 100644 (file)
--- a/RECEIVER.md
+++ b/RECEIVER.md
@@ -15,9 +15,20 @@ driver design ensures operation regardless of sense.
 In my testing a 38KHz demodulator worked with 36KHz and 40KHz remotes, but this
 is obviously neither guaranteed nor optimal.
 
+The TSOP4838 can run from 3.3V or 5V supplies. The former should be used on
+non-5V compliant hosts such as ESP32 and Raspberry Pi Pico and is fine on 5V
+compliant hosts too.
+
 The pin used to connect the decoder chip to the target is arbitrary. The test
-program assumes pin X3 on the Pyboard, pin 23 on ESP32 and pin 13 on ESP8266.
-On the WeMos D1 Mini the equivalent pin is D7.
+program `acquire.py` uses the following pins by default:
+
+| Host    | Pin | Notes |
+|:-------:|:---:|:-----:|
+| Pyboard | X3  |  |
+| ESP32   | 23  |  |
+| ESP8266 | 13  |  |
+| D1 Mini | D7  | WeMos name for pin 13. |
+| Pico    | 16  |  |
 
 A remote using the NEC protocol is [this one](https://www.adafruit.com/products/389).